Submission #332846

#	Time	Username	Problem	Language	Result	Execution time	Memory
332846		errorgorn	Palembang Bridges (APIO15_bridge)	C++17	0 / 100	1 ms	364 KiB

bridge

//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

int n,k;
vector<ii> v;
priority_queue<int,vector<int>,greater<int> > pq;

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>k>>n;
	
	char ca,cb;
	int qa,qb;
	ll same=0;
	
	rep(x,0,n){
		cin>>ca>>qa>>cb>>qb;
		
		same+=abs(qa-qb);
		if (ca!=cb) v.push_back(ii(min(qa,qb),max(qa,qb))),same++;
	}
	
	sort(all(v),[](ii i,ii j){
		return i.fi+i.se<j.fi+j.se;
	});
	
	if (k==1){
		ll ans=1e18;
		
		int delta=-sz(v);
		ll curr=0;
		for (auto &it:v){
			//cout<<it.fi<<" "<<it.se<<endl;
			pq.push(it.fi);
			pq.push(it.se);
			curr+=it.fi;
		}
		
		int pos=0;
		while (!pq.empty()){
			int temp=pq.top();
			pq.pop();
			
			curr+=delta*(temp-pos);
			pos=temp;
			delta++;
			
			ans=min(ans,curr);
			//cout<<curr<<endl;
		}
		
		cout<<ans*2+same<<endl;
	}
	
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37